Celery in Zone 8B — Texas

Celery might seem like a grocery store staple, but homegrown celery in Texas has a flavor you just can't beat. Plus, it adds a satisfying crunch to salads and soups, and is a great addition to your garden. Think of it as a cool-season challenge that pays off big time in taste and versatility.

Growing celery in Texas, especially with our unpredictable weather, requires a bit of planning. But with our long 273-day growing season and smart timing, you can absolutely enjoy a successful celery harvest.

Starting celery indoors is the way to go here in Texas. Begin in early to late December, about 10 weeks before you plan to transplant. Celery seeds are tiny and need a good head start.

Use seed trays with a good seed-starting mix. Keep them warm (around 70-75°F) and provide plenty of light. Celery seeds need light to germinate, so don't bury them too deep. A light sprinkle of vermiculite is enough. Bottom watering is your friend here to keep the soil consistently moist without disturbing the seeds.

Remember, celery is slow, so be patient. With our early spring character, getting them going early indoors is key to a successful harvest before the Texas heat really kicks in.

Transplant your celery seedlings outdoors in late February through late March. This gives them a chance to establish before the worst of our summer heat arrives.

Before transplanting, harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This will help them adjust to the Texas sunshine and wind. Space them 8-10 inches apart in well-prepared soil. Keep an eye on the forecast around transplant time – those late-season freezes can sneak up on you.

Celery is a thirsty plant, and consistent watering is absolutely critical in Texas. It's probably the most water-demanding vegetable you can grow. Without enough water, you'll end up with hollow, bitter stalks, and nobody wants that.

During the cooler spring months, aim for at least 1 inch of water per week. Once the Texas heat arrives, increase that to 2-3 inches per week. Use the "finger test" – stick your finger about 2 inches into the soil; if it feels dry, it's time to water. Water at the base of the plants to avoid wetting the foliage too much, especially with our variable humidity, which can encourage fungal diseases.

Signs of underwatering include wilting and stunted growth. Overwatering can lead to root rot, so make sure your soil drains well. A layer of mulch around your celery plants will help retain moisture and keep the soil cooler, which is a big plus when our temperatures start climbing.

You can expect your first celery harvest in late May through early July, about 85 days after transplanting. Look for outer stalks that are at least 8 inches long.

You can harvest individual stalks as needed, cutting them close to the base of the plant. This encourages continued production. Alternatively, you can harvest the entire plant when the stalks are about 12 inches or longer. If you want milder stalks, try blanching them by mounding soil around the base of the plants a couple of weeks before harvest.

As late November approaches and the first frost threatens, harvest any remaining celery. While celery is semi-hardy, a hard freeze will damage it.

Here are three common problems Texas gardeners face with celery:

Bolting from Temperature Stress

• What it looks like: The celery plant prematurely sends up a flower stalk. The stalks become bitter and tough.
• What causes it: Temperature fluctuations, especially sudden heat waves, stress the plant and trigger bolting. This is common with our unpredictable Texas weather.
• How to fix/prevent it: Choose bolt-resistant varieties. Provide shade during the hottest part of the day. Consistent watering also helps prevent stress.

Hollow Stalks

• What it looks like: The celery stalks are hollow inside instead of being solid.
• What causes it: Inconsistent watering and nutrient deficiencies, especially calcium.
• How to fix/prevent it: Maintain consistent soil moisture. Amend the soil with compost and a calcium source like bone meal or crushed eggshells before planting. Side-dress with a balanced fertilizer during the growing season.

Stringy Stalks from Heat

• What it looks like: The celery stalks become tough and stringy, making them less palatable.
• What causes it: High temperatures, especially during the later stages of growth.
• How to fix/prevent it: Plant early to harvest before the peak of summer heat. Provide afternoon shade. Ensure consistent watering to reduce stress.

Texas Specific Challenges: The combination of hot-to-extreme heat, variable humidity, and unpredictable rainfall in Texas can make growing celery challenging. Consistent monitoring and proactive measures are essential for a successful harvest.

Companion planting can give your celery a boost in Texas. Green beans add nitrogen to the soil, which celery loves. Cabbage family members help deter pests. Tomatoes provide shade during the hottest part of the day, which is a big plus in our climate. Onions also deter pests and don't compete for the same nutrients.

Avoid planting carrots near celery, as they compete for the same nutrients in the soil.